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In order to improve the DC voltage gain and reduce the electrical stress, a novel high voltage gain DC-DC converter based on Z-source is proposed. Theoretically, the ratio of output voltage to input voltage can reach (2-D)/(1-2D). Compared with the traditional diode capacitor filter Z-source DC-DC converter, the proposed topology can provide a higher DC voltage gain at the same duty cycle. It has lower voltage stress and inductance current stress when the DC voltage gain is the same. In addition, the input port and output port of the proposed DC-DC converter share the common ground, which helps to reduce the electromagnetic interference of the system. On this basis, the steady-state principle and characteristics of the proposed DC-DC converter are introduced, and the parameter design and theoretical efficiency calculation are also carried out. Finally, an experimental prototype with a power level of 200 W was fabricated, and experimental results proved the feasibility and superiority of the proposed circuit topology.
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为了提高直流电压增益并降低电器应力,提出1种基于Z源的新型高增益直流变换器,理论上输出电压与输入电压之比可达(2-D)/(1-2D)。与传统二极管电容滤波型Z源直流变换器相比,所提拓扑结构可以在相同占空比下提供较高的直流电压增益;当电压增益相同时,所提拓扑结构开关器件的电压应力及电感电流应力均有所降低;所提直流变换器的输入端口与输出端口共地,有助于降低系统的电磁干扰。在此基础上,进一步阐述了所提直流变换器的稳态原理特性,并进行参数设计和理论效率计算。最后,成功构建1台功率为200 W的实验样机,通过实验结果证明了所提电路拓扑的可行性和优越性。
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 |
程昱舒(1985-),男,通信作者,硕士,高级工程师。研究方向:电能计量与新能源发电。E-mail: 1253030630@qq.com。 |
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程昱舒(1985-),男,通信作者,硕士,高级工程师。研究方向:电能计量与新能源发电。E-mail: 1253030630@qq.com。
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程昱舒(1985-),男,通信作者,硕士,高级工程师。研究方向:电能计量与新能源发电。E-mail: 1253030630@qq.com。
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Topology of traditional Z-source DC-DC converter, figureFileSmall=YWiNoUVJQEjTXiu5sZSMKQ==, figureFileBig=KS/XCBR0PIugS3wiNhnHWg==, tableContent=null), ArticleFig(id=1154032487106863804, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图1, caption=
传统的 $\mathrm{Z}$ 源直流变换器拓扑结构, figureFileSmall=YWiNoUVJQEjTXiu5sZSMKQ==, figureFileBig=KS/XCBR0PIugS3wiNhnHWg==, tableContent=null), ArticleFig(id=1154032487178166976, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 2, caption=
Proposed high voltage gain DC-DC converter with low voltage stress and common ground, figureFileSmall=g265Sgl0EgJTqAbagVQCKw==, figureFileBig=ibn3vvDMsiXDyHjPXkCxrw==, tableContent=null), ArticleFig(id=1154032487245275843, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图2, caption=
所提低电压应力共地高增益直流变换器, figureFileSmall=g265Sgl0EgJTqAbagVQCKw==, figureFileBig=ibn3vvDMsiXDyHjPXkCxrw==, tableContent=null), ArticleFig(id=1154032487320773318, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 3, caption=
Equivalent circuits in two modes, figureFileSmall=FYcIehnmpiayjSvB9R1c8Q==, figureFileBig=x7bICMglmmYAyDMvauzn2A==, tableContent=null), ArticleFig(id=1154032487383687882, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图3, caption=
2种模式下的等效电路, figureFileSmall=FYcIehnmpiayjSvB9R1c8Q==, figureFileBig=x7bICMglmmYAyDMvauzn2A==, tableContent=null), ArticleFig(id=1154032487492739789, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 4, caption=
Steady-state waveforms of the proposed topology, figureFileSmall=Z//j8nuxCCSEXseOmAOIcQ==, figureFileBig=OdmvzRACwSSOPW0GjovHNQ==, tableContent=null), ArticleFig(id=1154032487610180303, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图4, caption=
所提拓扑的稳态波形, figureFileSmall=Z//j8nuxCCSEXseOmAOIcQ==, figureFileBig=OdmvzRACwSSOPW0GjovHNQ==, tableContent=null), ArticleFig(id=1154032487673094865, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 5, caption=
Schematic of average current circuit of inductance and power devices, figureFileSmall=WFOUWb3WcK8V/HuPznqVhg==, figureFileBig=O4icIWOpch2qai1/rinwCA==, tableContent=null), ArticleFig(id=1154032487731815123, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图5, caption=
电感和功率器件的平均电流电路示意, figureFileSmall=WFOUWb3WcK8V/HuPznqVhg==, figureFileBig=O4icIWOpch2qai1/rinwCA==, tableContent=null), ArticleFig(id=1154032487798923989, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 6, caption=
Comparison of voltage gain and device stress curves among three topologies, figureFileSmall=eT+xZz3dCQVejPQISnTAGg==, figureFileBig=Pa+bMjz7+r3nPQX9PTCtuw==, tableContent=null), ArticleFig(id=1154032487949918936, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图6, caption=
3种拓扑的电压增益和器件应力的对比曲线, figureFileSmall=eT+xZz3dCQVejPQISnTAGg==, figureFileBig=Pa+bMjz7+r3nPQX9PTCtuw==, tableContent=null), ArticleFig(id=1154032488029610713, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 7, caption=
Curve of relationship among transformation efficiency, ${V}_{\mathrm{i}}$ and $D$, figureFileSmall=CQOEplKhDpVi3NHIUvZDcQ==, figureFileBig=hOyw7SMNRFGltPjvhdcjCQ==, tableContent=null), ArticleFig(id=1154032488096719577, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图7, caption=
变换效率与 ${V}_{\mathrm{i}}$ 和 $D$ 的关系曲线, figureFileSmall=CQOEplKhDpVi3NHIUvZDcQ==, figureFileBig=hOyw7SMNRFGltPjvhdcjCQ==, tableContent=null), ArticleFig(id=1154032488159634139, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 8, caption=
Experimental waveforms of device voltage stress and inductance current stress of traditional $\mathbf{Z}$ -source converter, figureFileSmall=/WEK7s/yZXAcyl6UETLjYg==, figureFileBig=3oc1UIebn7g+UKTTNmO5iQ==, tableContent=null), ArticleFig(id=1154032488239325916, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图8, caption=
传统 $\mathrm{Z}$ 源变换器功率器件电压应力和电感电流应力实验波形, figureFileSmall=/WEK7s/yZXAcyl6UETLjYg==, figureFileBig=3oc1UIebn7g+UKTTNmO5iQ==, tableContent=null), ArticleFig(id=1154032488323211997, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 9, caption=
Experimental waveforms of proposed circuit topology, figureFileSmall=wh+LA71AnlVXlpISzEgijg==, figureFileBig=QqiMAmHHSVuvjYemitKYCA==, tableContent=null), ArticleFig(id=1154032488428069598, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图9, caption=
所提电路拓扑的实验波形, figureFileSmall=wh+LA71AnlVXlpISzEgijg==, figureFileBig=QqiMAmHHSVuvjYemitKYCA==, tableContent=null), ArticleFig(id=1154032488503567072, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 10, caption=
Dynamic experimental waveforms of, figureFileSmall=Kkl9bfBNhtyalBnSEl680g==, figureFileBig=UrQ30OtFvWq6Lg0pkBNT2A==, tableContent=null), ArticleFig(id=1154032488591647458, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图10, caption=
所提变换器的动态实验波形, figureFileSmall=Kkl9bfBNhtyalBnSEl680g==, figureFileBig=UrQ30OtFvWq6Lg0pkBNT2A==, tableContent=null), ArticleFig(id=1154032488696505060, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 11, caption=
Voltage gain under conditions of different duty cycles, figureFileSmall=+MGoe28a42TxXTbblxVA9w==, figureFileBig=GgVECR98UfBEQ7gie00PRQ==, tableContent=null), ArticleFig(id=1154032488788779751, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图11, caption=
不同占空比条件下的电压增益, figureFileSmall=+MGoe28a42TxXTbblxVA9w==, figureFileBig=GgVECR98UfBEQ7gie00PRQ==, tableContent=null), ArticleFig(id=1154032488952357610, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Fig. 12, caption=
Efficiency curves of traditional Z-source converter and the proposed converter, figureFileSmall=GZURVl0Iz5rGwlmWHmxW0g==, figureFileBig=5ltxEiGtwNW/DT4ZKesVAA==, tableContent=null), ArticleFig(id=1154032489032049387, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=图12, caption=
传统 $\mathrm{Z}$ 源变换器与本文所提变换器效率曲线, figureFileSmall=GZURVl0Iz5rGwlmWHmxW0g==, figureFileBig=5ltxEiGtwNW/DT4ZKesVAA==, tableContent=null), ArticleFig(id=1154032489120129772, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Tab. 1, caption=
Comparison of performance among converters, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 文献[6] | 文献[7] | 本文 |
| 二极管数量 | 2 | 3 | 3 |
| 开关数量 | 1 | 1 | 1 |
| 电容数量 | 3 | 5 | 4 |
| 电感数量 | 2 | 3 | 2 |
| 电压增益$G$ | $\frac{1}{1 -{2D}}$ | $\frac{1 + D}{1 -{2D}}$ | $\frac{2 - D}{1 -{2D}}$ |
| 开关电压 应力${V}_{\mathrm{S}}$ | $G{V}_{\mathrm{i}}$ | $\frac{{2G}+ 1}{3}{V}_{\mathrm{i}}$ | $\frac{{2G}- 1}{3}{V}_{\mathrm{i}}$ |
| 输入、输出 是否共地 | 否 | 否 | 是 |
), ArticleFig(id=1154032489195627247, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=表1, caption=
变换器性能对比, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 文献[6] | 文献[7] | 本文 |
| 二极管数量 | 2 | 3 | 3 |
| 开关数量 | 1 | 1 | 1 |
| 电容数量 | 3 | 5 | 4 |
| 电感数量 | 2 | 3 | 2 |
| 电压增益$G$ | $\frac{1}{1 -{2D}}$ | $\frac{1 + D}{1 -{2D}}$ | $\frac{2 - D}{1 -{2D}}$ |
| 开关电压 应力${V}_{\mathrm{S}}$ | $G{V}_{\mathrm{i}}$ | $\frac{{2G}+ 1}{3}{V}_{\mathrm{i}}$ | $\frac{{2G}- 1}{3}{V}_{\mathrm{i}}$ |
| 输入、输出 是否共地 | 否 | 否 | 是 |
), ArticleFig(id=1154032489258541810, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=EN, label=Tab. 2, caption=
Experimental parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值或型号 |
| 直流电源电压${V}_{\mathrm{i}}/\mathrm{V}$ | 30 |
| 输出电压${V}_{\mathrm{o}}/\mathrm{V}$ | 200 |
| 最大输出功率${P}_{\mathrm{o}}/\mathrm{W}$ | 200 |
| 开关频率${f}_{\mathrm{s}}/\mathrm{{kHz}}$ | 50 |
| 电感${L}_{1}\text{、}{L}_{2}/\mu \mathrm{H}$ | 240 |
| 电容${C}_{1}\text{、}{C}_{2}\text{、}{C}_{3}\text{、}{C}_{4}/\mu \mathrm{F}$ | 20 |
| 二极管${\mathrm{D}}_{1}\text{、}{\mathrm{D}}_{2}\text{、}{\mathrm{D}}_{3}$ | DPG60C300QB |
| 开关$\mathrm{S}$ | IXFH140N20X3 |
), ArticleFig(id=1154032489317262068, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1153375941402284446, language=CN, label=表2, caption=
实验参数, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值或型号 |
| 直流电源电压${V}_{\mathrm{i}}/\mathrm{V}$ | 30 |
| 输出电压${V}_{\mathrm{o}}/\mathrm{V}$ | 200 |
| 最大输出功率${P}_{\mathrm{o}}/\mathrm{W}$ | 200 |
| 开关频率${f}_{\mathrm{s}}/\mathrm{{kHz}}$ | 50 |
| 电感${L}_{1}\text{、}{L}_{2}/\mu \mathrm{H}$ | 240 |
| 电容${C}_{1}\text{、}{C}_{2}\text{、}{C}_{3}\text{、}{C}_{4}/\mu \mathrm{F}$ | 20 |
| 二极管${\mathrm{D}}_{1}\text{、}{\mathrm{D}}_{2}\text{、}{\mathrm{D}}_{3}$ | DPG60C300QB |
| 开关$\mathrm{S}$ | IXFH140N20X3 |
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